Rayon is a silky rayon made of cellulose, which is an organic compound that forms a major component of plants. Because it is a cellulosic fiber, many of its properties are identical to those of other fibers such as cotton and flax. The fibers are toothed and round.
Rayon is derived from petroleum and organisms. Bio-derived rayon is called regenerated fiber. Regenerated fiber is prepared by extracting pure α-cellulose (called pulp) from cellulose raw materials, using caustic soda and carbon disulfide. The orange yellow cellulose xanthate is obtained and redissolved in a dilute sodium hydroxide solution to form a viscous spinning dope called a viscose. The viscose is filtered and matured (at a certain temperature for about 18 to 30 hours to reduce the degree of esterification of cellulose xanthate), and after defoaming, wet spinning, the coagulation bath is made of sulfuric acid, sodium sulfate and sulfuric acid. Composition of zinc. The cellulose xanthate in the viscose is decomposed by the action of sulfuric acid in the coagulation bath, the cellulose is regenerated and precipitated, and the obtained cellulose fiber is washed, desulfurized, bleached, and dried to become viscose fiber. Since the carbon disulfide in production is toxic, it is easy to catch fire and explode after being mixed with air. Therefore, it is necessary to treat the three wastes (exhaust gas, waste water and waste residue), and pay attention to labor protection and safety. Currently, non-toxic cellulose solvents are being explored.
Viscose rayon is a medium to heavy fiber with good strength and wear resistance. It has hydrophilic properties (regain ratio of 11%). This fiber can be dry-cleaned and can be washed under good care conditions. It is not expensive to generate static electricity or pilling.
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